Finite difference calculations of the Hessian matrix are updated, new example notebook is added for sensitivity analysis using SALib.

[Dibyendu-IITKGP]

Description

Finite difference calculations of the Hessian matrix are updated in, new example notebook is added for sensitivity analysis using SALib.

Fixes # (834)

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #).

Important checks:

Please confirm the following before marking the PR as ready for review:

• No style issues: $ pre-commit run or $ nox -s pre-commit (see CONTRIBUTING.md for how to set this up to run automatically when committing locally, in just two lines of code)
• All tests pass: nox -s tests
• The documentation builds: nox -s doctest
• Code is commented for hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.01%. Comparing base (c11f068) to head (2d6fbc3).
⚠️ Report is 18 commits behind head on develop.

Files with missing lines	Patch %	Lines
pybop/analysis/classification.py	90.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #838      +/-   ##
===========================================
+ Coverage    89.81%   90.01%   +0.19%     
===========================================
  Files           61       63       +2     
  Lines         4783     4876      +93     
===========================================
+ Hits          4296     4389      +93     
  Misses         487      487              

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